[osg-users] Potential problem with PagedLOD and GeometryTechnique

Robert Osfield robert.osfield at gmail.com
Fri Sep 28 03:54:42 PDT 2007


Hi Rafa,

This crash very much sounds like a bug in the ATI driver.

Robert.

On 9/28/07, Rafa Gaitan <rafa.gaitan at gmail.com> wrote:
> Hi Robert,
>
> We have been using some classes of osgTerrain combined
> with PagedLOD. On Nvidia cards.. all works well but on
> ATI cards we have found a a crash!.
>
> We are using yesterday svn version. And María in a previous mail
> reported a similar problem, and we have tried to reproduce it
> using only C++.
>
> The problem is when the DatabasePager tries to compile the
> GeometryTechnique and passes through the traverse call.
> The call to init(), inside the traverse, the one outside the Update
> phase, is called. The problem remains in the geometry created inside
> GeometryTechnique because it use the hint
> setUseVertexBuffers(true), and I don't know really why, but
> it makes a crash. On Nvidia cards and MacOSX there is no problem,
> but on Windows and linux with ATI.. doesn't work at all. Changing
> the hint to setUseDisplayLists(true), and disabling the use of
> vertexBufferObjects works without problems.
>
> Rafa.
>
> --
> Rafael Gaitán Linares
> Instituto de Automática e Informática Industrial  http://www.ai2.upv.es
> Ciudad Politécnica de la Innovación
> Universidad Politécnica de Valencia
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>



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